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Cracks in Arctic sea ice turn low clouds on and off

Science Daily - Fri, 01/10/2020 - 06:37
The prevailing view has been that more leads are associated with more low-level clouds during winter. But an atmospheric scientists noticed something strange in their study of these leads: when lead occurrence was greater, there were fewer, not more clouds.

Scientists use ancient marine fossils to unravel long-standing climate puzzle

Science Daily - Thu, 01/09/2020 - 09:55
Scientists have shed new light on the Earth's climate behavior during the last known period of global warming over 14 million years ago.

Sea-ice-free Arctic makes permafrost vulnerable to thawing

Science Daily - Wed, 01/08/2020 - 12:16
New research provides evidence from Siberian caves suggesting that summer sea ice in the Arctic Ocean plays an essential role in stabilizing permafrost and its large store of carbon.

Antarctic waters: Warmer with more acidity and less oxygen

Science Daily - Mon, 01/06/2020 - 11:20
The increased freshwater from melting Antarctic ice sheets plus increased wind has reduced the amount of oxygen in the Southern Ocean and made it more acidic and warmer, according to new research.

Global extent of river ice loss as Earth warms

Science Daily - Wed, 01/01/2020 - 13:40
A new study found that annual river ice cover will decline by about six days for every one degree Celsius increase in global temperatures. This decline will have economic and environmental consequences.

North Atlantic Current may cease temporarily in the next century

Science Daily - Mon, 12/30/2019 - 07:48
The North Atlantic Current transports warm water from the Gulf of Mexico towards Europe, providing much of north-western Europe with a relatively mild climate. However, scientists suspect that meltwater from Greenland and excessive rainfall could interfere with this ocean current. Simulations showed that there is a 15 percent likelihood that there will be a temporary change in the current in the next 100 years.

Ancient Mediterranean seawall first known defense against sea level rise and it failed

Science Daily - Wed, 12/18/2019 - 14:35
Ancient Neolithic villagers on the Carmel Coast in Israel built a seawall to protect their settlement against rising sea levels in the Mediterranean, revealing humanity's struggle against rising oceans and flooding stretches back thousands of years.

Ice sheet melting: Estimates still uncertain

Science Daily - Wed, 12/18/2019 - 14:34
Estimates used by climate scientists to predict the rate at which the world's ice sheets will melt are still uncertain despite advancements in technology, new research shows.

New ice river detected at Arctic glacier adds to rising seas

Science Daily - Tue, 12/17/2019 - 14:29
Geologists, examining the desolate Vavilov ice cap on the northern fringe of Siberia in the Arctic Circle, have for the first time observed rapid ice loss from an improbable new river of ice, according to new research.

In ancient Scottish tree rings, a cautionary tale on climate, politics and survival

Science Daily - Tue, 12/17/2019 - 13:15
Using old tree rings and archival documents, historians and climate scientists have detailed an extreme cold period in Scotland in the 1690s that caused immense suffering. It may have lessons for Brexit-era politics.

November 2019 was 2nd hottest on record for the planet

Science Daily - Mon, 12/16/2019 - 14:15
November 2019 was the second-hottest November for the planet in the 140-year global climate record, according to scientists at NOAA.

Barrels of ancient Antarctic air aim to track history of rare gas

Science Daily - Fri, 12/13/2019 - 08:25
An Antarctic field campaign last winter led by the US and Australia has successfully extracted some of the largest samples of air dating from the 1870s until today. Researchers will use the samples to look for changes in the molecules that scrub the atmosphere of methane and other gases.

Canadian tundra formerly covered in rich forest: Ancient plant fossil record shows

Science Daily - Thu, 12/12/2019 - 15:33
Canada's northernmost islands, Ellesmere and Axel Heiberg islands in Nunavut, were home to a vibrant, temperate forest 56 million years ago, according to fossil research.

High-precision map of Antarctic ice sheet bed topography

Science Daily - Thu, 12/12/2019 - 11:25
Glaciologists have unveiled the most accurate portrait yet of the contours of the land beneath Antarctica's ice sheet -- and, by doing so, have helped identify which regions of the continent are going to be most vulnerable to the impact of future climate warming.

Research confirms timing of tropical glacier melt at the end of the last ice age

Science Daily - Wed, 12/11/2019 - 13:56
Findings on ice retreat across the global tropics clarifies how the low latitudes transformed during the end of the last ice age and can help current-day predictions of our own climate future.

Mountain goats' air conditioning is failing, study says

Science Daily - Wed, 12/11/2019 - 13:56
A new study says Glacier National Park's iconic mountain goats are in dire need of 'air conditioning.'

Scrubbing carbon dioxide from smokestacks for cleaner industrial emissions

Science Daily - Wed, 12/11/2019 - 13:56
Chemistry researchers have uncovered a better way to scrub carbon dioxide from smokestack emissions, which could be a key to mitigating global climate change.

Shrinking of Greenland's glaciers began accelerating in 2000, research finds

Science Daily - Wed, 12/11/2019 - 10:55
Satellite data has given scientists clues about how, when and why Greenland's glaciers are shrinking -- and shows a sharp increase in glacial retreat beginning about 2000, according to new research.

Why polar bears at sea have higher pollution levels than those staying on land

Science Daily - Wed, 12/11/2019 - 07:35
As the climate changes, myriad animal populations are being impacted. In particular, Arctic sea-ice is in decline, causing polar bears in the Barents Sea region to alter their feeding and hunting habits. Bears that follow sea-ice to offshore areas have higher pollutant levels than those staying on land -- but why? A new study reports the likely reasons.

Ice in motion: Satellites capture decades of change

Science Daily - Tue, 12/10/2019 - 10:17
New time-lapse videos of Earth's glaciers and ice sheets as seen from space -- some spanning nearly 50 years -- are providing scientists with new insights into how the planet's frozen regions are changing.

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